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secrets.go
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secrets.go
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// Copyright (c) 2021 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package validation
import (
"fmt"
"net/url"
"strings"
corev1 "k8s.io/api/core/v1"
"github.com/gardener/gardener-extension-provider-openstack/pkg/openstack"
)
const (
tenantNameMaxLen = 64
)
// ValidateCloudProviderSecret checks whether the given secret contains a valid OpenStack credentials.
func ValidateCloudProviderSecret(secret *corev1.Secret) error {
credentials, err := openstack.ExtractCredentials(secret, false)
if err != nil {
return err
}
secretKey := fmt.Sprintf("%s/%s", secret.Namespace, secret.Name)
// domainName, tenantName, and userName must not contain leading or trailing whitespace
for key, value := range map[string]string{
openstack.DomainName: credentials.DomainName,
openstack.TenantName: credentials.TenantName,
openstack.UserName: credentials.Username,
openstack.ApplicationCredentialID: credentials.ApplicationCredentialID,
openstack.ApplicationCredentialName: credentials.ApplicationCredentialName,
openstack.ApplicationCredentialSecret: credentials.ApplicationCredentialSecret,
} {
if strings.TrimSpace(value) != value {
return fmt.Errorf("field %q in secret %s must not contain leading or traling whitespace", key, secretKey)
}
}
// tenantName must not be longer than 64 characters, see https://docs.openstack.org/api-ref/identity/v3/?expanded=show-project-details-detail
if len(credentials.TenantName) > tenantNameMaxLen {
return fmt.Errorf("field %q in secret %s cannot be longer than %d characters", openstack.TenantName, secretKey, tenantNameMaxLen)
}
// password must not contain leading or trailing new lines, as they are known to cause issues
// Other whitespace characters such as spaces are intentionally not checked for,
// since there is no documentation indicating that they would not be valid
if strings.Trim(credentials.Password, "\n\r") != credentials.Password {
return fmt.Errorf("field %q in secret %s must not contain leading or traling new lines", openstack.Password, secretKey)
}
// authURL must be a valid URL if present
if credentials.AuthURL != "" {
if _, err := url.Parse(credentials.AuthURL); err != nil {
return fmt.Errorf("field %q in secret %s must be a valid URL when present: %v", openstack.AuthURL, secretKey, err)
}
}
return nil
}